I use SD and TM, although on different drives. You could use them on separate partitions of the same drive. TM machine gives you the ability to revert to any system, or restore files, from many different days. SD allows you to revert from only the last clone, but you can boot from a SD hard drive, which you can't do with TM (at least previous to Mountain Lion).
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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